1017678993 has 8 divisors (see below), whose sum is σ = 1362729888. Its totient is φ = 675540384.

The previous prime is 1017678989. The next prime is 1017679031. The reversal of 1017678993 is 3998767101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1017678993 - 2² = 1017678989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1017678923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727255 + ... + 728652.

It is an arithmetic number, because the mean of its divisors is an integer number (170341236).

Almost surely, 2^1017678993 is an apocalyptic number.

It is an amenable number.

1017678993 is a deficient number, since it is larger than the sum of its proper divisors (345050895).

1017678993 is a wasteful number, since it uses less digits than its factorization.

1017678993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456143.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 1017678993 is about 31901.0813766556. The cubic root of 1017678993 is about 1005.8586073576.

The spelling of 1017678993 in words is "one billion, seventeen million, six hundred seventy-eight thousand, nine hundred ninety-three".